diff --git a/object.js b/object.js
index ba50d54..5d864cd 100755
--- a/object.js
+++ b/object.js
@@ -261,7 +261,7 @@ function(base, obj, non_strict){
 //---------------------------------------------------------------------
 // Prototype chain content access...
 
-// trigger iteration stop...
+// Value trigger iteration stop and to carry results...
 //
 // NOTE: we need Constructor(..) to make this so will deffer this to the 
 // 		end...
@@ -962,9 +962,11 @@ function Constructor(name, a, b, c){
 		})
 	// set generic raw instance constructor...
 	_constructor.__rawinstance__ instanceof Function
-		|| (_constructor.__rawinstance__ = 
-			function(context, ...args){
-				return RawInstance(context, this, ...args) })
+		|| Object.defineProperty(_constructor, '__rawinstance__', {
+				value: function(context, ...args){
+					return RawInstance(context, this, ...args) },
+				enumerable: false,
+			})
 	!!constructor_proto
 		&& (_constructor.__proto__ = constructor_proto)
 	_constructor.prototype = proto
diff --git a/package.json b/package.json
index 22a3d83..888b0fe 100755
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "ig-object",
-  "version": "5.4.11",
+  "version": "5.4.12",
   "description": "",
   "main": "object.js",
   "scripts": {
diff --git a/test.js b/test.js
index b55d597..f48f15c 100755
--- a/test.js
+++ b/test.js
@@ -766,6 +766,13 @@ var cases = test.Cases({
 		assert(z.b == 'bbb', 'mixin content from C')
 		assert(z.c == 'ccc', 'mixin content from C')
 
+		/*/ XXX
+		assert(C.mixout(z) === z, 'C.mixout(..) partial')
+
+		assert('a' in z, 'post-mixout (partial) non mixed content retained')
+		assert('b' in z == false, 'post-mixout (partial) content gone')
+		assert('c' in z == false, 'post-mixout (partial) content gone')
+		//*/
 	},
 })